<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>BMI身体健康指数</title>
</head>
<body>

<h1>BMI身体健康指数</h1>
<form action="/bmi" method="post">
    身高(米):<input type="text" name="height" placeholder="身高"><br>
    体重(kg):<input type="text" name="weight" placeholder="体重"><br>
    <input type="submit"><br>
</form>

</body>
</html>